Improvement in machines for boring wells



UNITED STATES Perlesrrv OFFICE,

'MALooLM CAMPBELL AND Joan. coLE, or PHILADELPHIA, PA.

IMPROVEMENT INMAcHviN-Es Fon BORING WELLS, are.'

' Specification forming part` of Letters Patent No. 418,515, dated July 4, 1865.

To all Iwhom it may' concern` .Be lit known that-we, MALCOLM CAMPBELL and JOB H. COLE, of the city and county of Philadelphia, and State of Pennsylvania, have inyentedcertain new-and usefullmprovements in Machines for Drilling ,Artesian and other VVV'ells; 4and we (lo-hereby declare that the fol- We are aware thatmany' devices for lifting and tripping a drill in'drilling-machines have been. essaye'd, but-*ours differs from any of which we have ,knowledge inthe`fact thatii ttakes a-trni nnyielding holdlilpon the: drill? stocklto raise it, ,while it is asfreeand quiekto drop the drill after ithas vbeen raised as any `of those that carrytlie'drill-stock byf'frietion only. Y j l Our invention consistsin corrugatngthe drillstock and `the lifting-cams where 4they come incontact with the drillstock, so that the liftis a positive one Vandthe release just as eiiicientas though the lifting were-by` friction. v

To enable others skilled in the art to make and use our invention, we will proceed to describe the same with reference tothe drawings. l A'rpresents a frameon whichthemachinery is supported.

or in any7 other manner, and carries a gearwheel, C, thatturns another gear, I), on a shaft, The gear D works into' andV turns a gear, F, on a shaft, G, which is-parallel to the shaftE. Uponthese two shafts E Gare placed, respectively, the lifting-.cams H I, which turn toward eachother, and when theyineet, or

nearly so, they graspand raise up the drill-stock J, and as they continue to turn they release it and allow it to fall. These cams H Ihave serrations or indentations made in their curved B is a shaft turned by a crank, belt-wheel, l

y faces or perimeters, and thed rill-stockJ is also serrated, indented, or corrugated, so that the camsshall have an unyielding ho'id upon the drillstock. These roughened surfaces are shown at a b. -On one end of the shaft E there is a cam, c, that works iny a yoke, 1,011 the end of a piyoted bell-crank lever,"K,"andto this bell-crank is connected a,dog or pawl,c, that works into and turns a ratchet-wheel, L, ar-l ranged on a shaft,- M. On the top of this` shaft M there 'is a gear, N, that works in and turns alargergear-wheeLO. Thedrill-stockJpasses- `through the hub of the wheel @,and istted v thereto by a feather and pin, Vso that while the drillfst'ock may rise-andfall independent of the cog-wheel `Q., yetthe cog-wheel will gradually V turnl thedrill inthefhole being cut to -keep'it round." drill-stock has a counterpoise-- weight, '1?, cfo nnectel to itby means of a cord or chain," f, running over pulleys-Q Q', `toaid y in raising upthe dril-lfwhen, by its great length,

it becomes ye'ry heavy, 'and' this counter-poise can be varied tosuit the length and weight of d'rilhstock' that'is to be raised. The bearings '-of'tlie' shafts E G are so arranged with rubber R behind them as toyield to any .undue strain,- and set-screws, g 'are arranged at the front and rear of the boxesor bearings, lto adjust them and the cams which the shafts,gsupported in them, carry. The drill-stocks are united by'a 4 serewsleeve, h, the rods being simplybutted Y againsteach other. This plansat'es the threads v from being stripped or inj ured, as they are when screwed together socket fashion 5 andthey may be hollow for pumping the dbris through.

rllhe drill S may haveany suitable number i `of cutting-edges, which may radiate from its center.' These cuttingedges are ,beveled olf at different angles-that is, more abru t--onone side than on the other, so that the* low :of the drill will aid it in turning. The coun- ,stock make their action ascertain as cogged.

gears, without thedanger incident to the lat ter from failing to gear. with certainty. Having thus fully described our invention,

'what we claim therein is- 1. (lorrugating or otherwise inde-nting the.

contact-surfaces ofthe lifting-cams and drilb steek, so ltmtsfche lifting' will be positivj and raising the drill when,fr0m its extreme length,

without liability to slip, substantially as deit beeomes'very heavy,m1dto equalize the force scribed. with which it falls, substantially asdeseribed. 2..,v Hanging the lifting cam-shafts in adjust- MALCOLM CAMPBELL.

able and self-yielding boxes o1' bearings, asand JOB H. COLE.

for the purpose described. Y l

3. In combination wit-l1 the drill-stock and itslil'tin'g-cams,thecountcrpoise1*,f0midingin Yvitnesses:

A. B. STOUGHTONL EDM. F. BROWN. 

